Adjustable boxing for shafts



Nov. 2 1926.

G. G. REEVES ADJUSTABLE BOXING FOR SHAFTS Ornal Filed Jan. 17 1 1924 Nav. 2,1926. 1,605,613

* G. G. REEVES ADJUSTABLE BOXING FOR SHAFTS Original Filed Jan. 17. 1924 'y 2 Sheets-Sheet f attenua? Patented Nov. 2, 1926.

httifii PATENT OFFICE.

GEORGE GURLY REEVES, F SHREVEPORT, LOUISIANA.

ADJUSTABLE BOXING FOR SHAFTS.

Continuation of applicati-on Serial No. 686,831, filed January 17, 1924. This application filed January 30,

1926. serial This invention relates to an adjustable boxing for shafts and the like, and its object is to provide a device by means of which the boxing may be adjusted and secured permanent-ly in position without theY use of bolts, nuts, set screws or the like, and yet the boxing may be easily and quickly disassembled when desired.

With this general object in view., the invention comprises various novel features of construction and combination of elements, which will be hereinafter described in detail in connection with the accompanying drawings.

The present application is a continuation of my earlier applic-ation No. 686,831, filed January 17, 1924, but embodies certain minor modifications of the structure shown therein, which facilitatey itsassembly.

In the accompanying drawings:

Figure 1 is a plan view of the invention.

Figure 2 is a side elevation thereof, with the shaft shown in section.

Figure 3 is a vertical section taken on the line 3-3 of Figure 1.

Figure 4 is a vertical section taken on the line 4 4 of Figure 2.

Figure 5 is a detail perspective view of the mandrel, and the means formed thereon for adjusting and locking the boxing.

Figure 6 is a detail perspective view of one of the locking pawls.

Figure 7 is a side elevation showing another applicationv of the invention.

Figure 8 is a detail perspective view of the cap piece shown in Figure 7.

Figure 9 is a view similar to Figure 4,

but shows a modified form of locking means.

Figure 10 is a detail perspective view of the locking key used in the modified construction shown in Figure 9.

Referring in detail to the drawings, a base block 1 is shown secured to a frame 2 by means of bolts 3, the nuts ofwhich may, if desired, be permanently secured by welding or an equivalent method. If desired, however, the block 1 maybe cast in one piece with the frame 2. The block 1 has a semi- A block 1 have opposed shoulders 6, which receive the ends of'arcap piece .7, having a semi-cylindrical bearing portion-8,; whichfis the base block.

complementary to the bearing portion 4 of The cap piece 7 may also be further held against movement transversely of the shaft 5 by means of opposed shoulders 9 formed on the cap piece and base block, respectively.

On each side of the shaft 5, the base block is formed with a pair of oppositely -disposed slots or gains 10, the lower portions of which are flared,'as shown at 11, to form a seat for the flared lower portions 13 of ears 12, which, when the device is assembled, extend upwardly above the boxing, as shown in Figure 2.

The ears 12 near their upper ends are formed with inclined bearings 14, which receive the correspondingly tapered end portions or trunnions 27 of the mandrels 15. Each mandrel is formed with eccentric portion 16 each having at one side a plain fiat surface 17 on which the mandrel may rest before the bearings are taken up. When the mandrel is rotated, these eccentric portions engage against the` upper face of the cap piece 7 and progressively tighten the bearings of the shaft 5. The mandrel is preferably provided also with a. non-circular portion 18 for engage-ment by a wrench when the bearing is adjusted.

A toothed segment 19 is also formed on the mandrel between the thicker portions of the eccentrics 16, and a channel 20 is formed in the upper surface of the cap piece 7 directly underneath the toothed portion 19, as will be seen from Figures 1, 3 and 4. As shown in the drawings two pawls 21 are pivoted, as at 22, and disposed within the channel 20, the free ends of the pawls being normally urged upwardly by coiled springs 23, which are seated in opposed recesses 24 and 25- formed in the bottom of the channel 20 and in the undersides of the pawls, respectively. 'A tooth26 is formed on the upper face of 'each pawl near its free end, which is engageable with the teeth of the segment l19 tolock the mandrel against backward r0- tation when the same is rotated to tighten the bearings. Two pawls 21 are shown in the drawings, vand the teeth of the segment 19 are elongated so that they may be alternately engaged bythe teeth 26 of the respec- "tive pawls, one tooth being arranged slightly in advance of the other,but it will, of course, be.: apparent that 'slngle pan/l may .be used fit) (). Lul.

il desired. Each pawl is extended beyond the mandrel to form a thumb piece 21a.

lt will be noted that the bearings 14 are inclined downwardly and inwardly, and that the bearing portions or trunnions 2 of the mandrel are correspondingly tap-ered `with their terminal portions of arsize to. be inserted through the bearings 14. llVhen the mandrel 15 is rotated, to bring the thicker portions of the eccentrics 16 into engagement. 5

with the upper surface of the cap piece, thus exerting pressure. on the lat-ter to tighten the bearings, the trunnions 27 will also be raised upwardly and will engage the upper sides ot thebcarings 14, andfwillhave a tendencyl to draw 4the ears 12 upwardly as well as inwardly into iirin engagement with the slots 10, thus compensating tor any-wear which may Voccur between-the earsv and the sides ot the slots.

ln lligures and 8 I have shown the inv vention as appliedfto a jack post 28, having the boxes 29 cast integralA therewith, and provided with corresponding'cap pieces 30. ln this form, the ears or straps 31 arefformed ot different lengths to correspond with the positions they occupy on'the jack post. The

shaft 32 is equivalent to the shaft 5, and the cap piece 30 is formed with slots 33l and channels 311, similar to the slots 10 and channels 20 above described. The jack post is provided with a countersunk panel 35 to permit the convenient 4removal or-insertion oi' the ears 31.

ln the-modification shown in Figures 9 and 10, the mandrel 15 and ears 12 are constructed in the same. manner as shown in) drel the key 37 may be moved laterally into` the position shown in Figure 9, and the mandrel 15 has ya reduced portion 41 above the' raised portion 39 of the recess,l so that with the -ley in this position the mandrel may be ircely rotated.

From the foregoing description it will be seen that means are providedy lby which* bearings may be quick-ly assembled and ad- 'usted and may be locked aoainst the Jessi- 7 o C bility et accidentally becoming loose, and" without the use of any bolts, nuts, set screws or washers.: The pawls v21 automatically loclrthe. mandrel as-the latter is rotatedto The detail a number of forms by which the invention maybe carriedout, it will be un- Yder-stood that these are merely illustrative,

and that various other modilications may be made without departing from the salient features ot the invention'. It will also be understood Athat although the invention is described as applied to shai't bearings, the same principle may be used in fastening any kind ot bearing members, plates, dogs, or similar mechanism. It is, therefore, my intention to include all such adaptations of the invention within'the scope ot the appended claims.

lVhat is claimed is 1. Ina device` of the character described, the combinationl of a base, a cap piece cooperating therewithfand having'a channel'in its upper tace, a member rotatably mounted on the baseand having aneccentric portion engageable directly with the upper tace ol: the cap piece androta'table to adjust the bearing, a toothed'segment on the rotatable member, and toothed means mounted on the base within said channel and engagea-ble with the teeth ot'the segment tofhold'said rotatable member -in its adjusted position.`

2.1In a device of the character described, the combination 'of a basel block, a cap piece cooperating therewith and having a channel in its upper face, ears projecting upwardly trom the base block above the cap piece, a mandrel rotatablymounted in saidears and having two eccentric portions engageable directly "with the upper face of the cap piece, said eccentric portions being located one at each side of the channel,'a toothed segment on the mandrel between said eccentric portions and above the channel, and

toothed means mounted on the base block withinv the channel andengageable with the teeth'ot vthesegmentfto hold the mandrel in its adjusted position'.

3. In a device of the character described, the combination of a base,a cap piece cooperating therewith, a member rotatably mounted onthel base Vand having eccentric portions engageable directly with the upper vaceof'fthe''cap pieceito adjust the tension otits engagement with the base, .said rotatablemember havingca toothed segment located substantially centrally thereon and between 'the eccentric portions, and toothed means Yengageable with the toothed segment to loelrthe rotatable member.

hln a device of the character described, thecombination ota base block, a. cap piece cooperating therewith to form a bearing, a

pairot rotatable members mount-ed above the Abase block, one at each side ot the beary y -ing,feach otsaid rotatable members having tal-:e up the-bearings; and it two'fpa'wls are an eccentricT lportion directly r engageable on, and toothed means engageable with the toothed segment to lock the rotatable meinber.

5. In a device of the character described, a base bleek, a cap peee Cooperating therewith to form a .shaft bearing, a mandrel rotatably mounted above the block and having an .eeeentrie portion engageable with the upper surface of the cap to tighten the b earing, a toothed segment on the mandrel, said cap piece having a channel beneath the mandrel, a pavvl pivotally mounted in said ears and having on its upper side a tooth engageable with the teeth of the segment to lock the same against reverse rotation, and spring means for normally holding the paWl tooth in engagement with the mandrel.

In testimony, that I Claim the foregoing as my Own, I have hereto affixed my signature.

GEORGE GURLY REEVES. 

